So I found this playable version of Puzzle PICO on Reddit (credit to u/hamzaabamboo for making it! :D)The instructions are below:

Keyboard

• ⁠Arrow Left/ Arrow Right : Go Left and Right

• ⁠Arrow Up, X : Rotate Clockwise

• ⁠Control, Z : Rotate Counter Clockwise

• Arrow Down : Soft Drop (a.k.a drop faster)

• Space bar : Hard Drop (a.k.a drop quickly)

• ⁠Shift + arrow up : Fly with Kokoro

• ⁠R : Reset

Mobile

• Swipe Left : Move Left

• Swipe Right : Move Right

• Swipe Down : Hard drop

• Tap on left half of the screen : Rotate Counter Clockwise

• ⁠Tap on right half of the screen : Rotate Clockwise

• ⁠Long press : Soft drop